Coal recovery processes utilizing agglomeration and density differential separations
US4249699A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1979 |
| Grant date | Feb 10, 1981 |
| Priority date | — |
| Expiry date | Dec 4, 1999 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB65G53/30
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Processes for recovering coal from a particulate composite in which the composite is mechanically worked in the presence of an agglomeration promoting additive and in an aqueous carrier to effect a separation of the particles of coal in the composite from mineral matter associated therewith, a coalescence of the coal particles into product coal agglomerates, and a dispersion of the mineral matter in the aqueous carrier. The product coal agglomerates are resolved into their particulate constituents, and the latter are subjected to a density differential separation which effects a separation of that material in the agglomerates which has a relatively low mineral matter content and a high coal content from that having a higher content of mineral matter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.